<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./jquery-1.11.3.min.js"></script>
    <script>
        //        自动刷新
        $(function(){
            $('#btn').click(function(){
                $('#imgs').attr('src','./code.php?id='+Math.random());
            })
        })

    </script>
</head>
<body>
<img src="./code.php" alt="" id="imgs" onclick="this.src=this.src+'?rand='+Math.random()">
<br>
<button id="btn">点我呀!!!</button>
</body>
</html>